Vaginal Cyst
A vaginal cyst is a fluid-filled sac in the wall of the vagina. Most are small, painless, and discovered by chance—during a routine examination, a cervical screening appointment, or by a woman herself. The great majority are entirely benign and require no treatment. They arise in several distinct ways: some are remnants of structures present during fetal development, others form when a gland or duct becomes blocked, and some follow childbirth or surgery when a fragment of tissue becomes trapped beneath the surface. The type matters mainly because the location and origin determine whether anything needs doing, and because a small number of lesions in this area need distinguishing from cysts before being dismissed.
What is it?
The vagina is a muscular canal lined by a layer of specialised surface cells, with supporting tissue beneath containing blood vessels, nerves, and small glands. A vaginal cyst is a fluid-filled sac that develops within this wall, and the several types differ in where they sit and how they came to be there.
Understanding the categories is useful mainly because location is the strongest clue to type, and because two of them require particular attention.
Inclusion cysts are the most common overall and are acquired rather than congenital. They form when a fragment of the vaginal surface lining becomes buried beneath the surface during healing—typically after an episiotomy, a tear during childbirth, or vaginal surgery. The trapped cells continue to shed as they normally would, but with nowhere to go, the material accumulates into a cyst. They are most often found on the lower posterior wall, where obstetric injury and repair are concentrated, and they usually appear months or years after the event.
Gartner duct cysts are the most common congenital type. They arise from remnants of the Wolffian ducts, structures that form parts of the male reproductive tract during fetal development and normally regress almost entirely in females. Fragments occasionally persist along the side wall of the vagina, and where a segment fills with fluid, a cyst forms. They are characteristically located on the upper anterolateral wall—high up and toward the side—and this position is often enough to identify them. Most are small and asymptomatic. Because they are developmental in origin, and because the Wolffian ducts are closely related to the developing urinary system, Gartner duct cysts occasionally accompany kidney or ureteric abnormalities, and imaging of the urinary tract is reasonable where one is found, particularly if it is large or associated with symptoms.
Bartholin cysts arise from the two glands sitting just inside the vaginal opening at roughly the four and eight o’clock positions, which secrete fluid contributing to lubrication. If the duct draining a gland becomes blocked, secretions accumulate and a cyst forms. These are very common. A Bartholin cyst is typically a smooth swelling at the vaginal entrance, painless when uninfected. If bacteria enter, an abscess develops, producing a painful, red, hot, tense swelling that can make sitting and walking difficult—this is one of the more common acute gynaecological presentations and is what most often brings a Bartholin problem to attention.
Skene duct cysts arise from small glands adjacent to the urethral opening. They sit near the front, close to the urethra, and can be mistaken for a urethral diverticulum.
Müllerian cysts arise from remnants of the ducts that form the uterus and upper vagina. They can occur anywhere in the vaginal wall and are lined by tissue resembling the cervical or uterine lining, sometimes producing mucus.
Endometriotic deposits can occur in the vaginal wall, typically at the top behind the cervix, and characteristically cause pain and bleeding that vary with the menstrual cycle.
Two lesions in this region are not cysts but are frequently mistaken for them, and distinguishing them matters.
A urethral diverticulum is an outpouching from the urethra itself, communicating with it. It presents as a swelling on the front wall of the vagina and may be indistinguishable from a cyst on examination. The distinguishing features are a classic triad of pain, urinary frequency or urgency, and dribbling of urine after voiding, though the full triad is often absent. Pressing on the swelling may express urine or pus from the urethra. It matters because treating it as a simple cyst and excising it without recognising the connection to the urethra risks creating a urethrovaginal fistula—a permanent leak—which is considerably harder to repair than the original problem. MRI reliably identifies it and is the reason imaging is recommended for any anterior vaginal wall swelling near the urethra.
Vaginal malignancy is uncommon but is the other reason not every lesion is assumed to be a cyst. Primary vaginal cancer is rare; more often, cancer in this region represents extension from the cervix or vulva, or a metastatic deposit. Features that should prompt biopsy include a lesion that is solid rather than fluid-filled, irregular, ulcerated, fixed to underlying tissue, bleeding, or enlarging, and any new vaginal lesion in a postmenopausal woman warrants a lower threshold for tissue diagnosis.
Most vaginal cysts cause no symptoms at all and are found incidentally.
Where symptoms occur, they relate to size and position. A sensation of pressure, fullness, or something protruding is common with larger cysts. Discomfort or pain during intercourse occurs, particularly with cysts on the anterior wall or near the entrance. Difficulty inserting tampons, or a tampon not sitting properly, is sometimes the first thing a woman notices. Urinary frequency or a sense of incomplete emptying can occur with anterior cysts pressing on the urethra or bladder.
Pain, redness, heat, and rapid enlargement indicate infection, and this is most characteristic of Bartholin abscesses, which develop over a few days and can become severe enough to prevent sitting.
Cyclical pain and bleeding suggest an endometriotic deposit rather than a simple cyst.
Continuous dampness, post-void dribbling, recurrent urinary infections, or pain on passing urine alongside an anterior swelling point toward a urethral diverticulum.
Assessment is usually straightforward because the vagina is directly examinable.
Clinical examination establishes the position, size, consistency, and mobility of the lesion, whether it is tender, and whether it is fluid-filled. The location alone frequently indicates the likely type: upper side wall suggests Gartner duct, lower posterior wall suggests inclusion cyst, the entrance at four or eight o’clock suggests Bartholin, and anterior near the urethra raises the question of a Skene cyst or urethral diverticulum. The urethra is milked to check for discharge where an anterior lesion is present.
Ultrasound, performed transvaginally or across the labia, confirms the cystic nature of the lesion, measures it, and clarifies its relationship to the urethra, bladder, and rectum.
MRI of the pelvis is the most informative investigation for lesions that are large, deep, complex, or anterior, and it is the reference standard for diagnosing a urethral diverticulum and for planning surgery. It also characterises the contents, which helps distinguish simple fluid from blood or mucus.
Biopsy or excision is performed where the lesion is not clearly a simple cyst. Features that lower the threshold include solid components, irregularity, fixation, ulceration, bleeding, rapid growth, and postmenopausal status.
Where a Gartner duct cyst is identified, imaging of the kidneys and ureters is reasonable given the developmental association.
Important to Know
The practical message for most women is reassuring: a small, smooth, painless vaginal cyst requires no treatment, no monitoring, and no imaging follow-up once it has been assessed and its nature established. Care is typically managed by primary care clinicians and gynaecologists, with urogynaecology or urology involvement where the urethra is involved.
Leaving a cyst alone is a legitimate choice rather than a failure to act. Vaginal cysts do not become cancerous, do not affect fertility, do not interfere with pregnancy or vaginal delivery in most cases, and frequently remain unchanged for years or decades. Where a woman is not troubled by it, observation is entirely appropriate.
Removal is appropriate where a cyst causes genuine symptoms—pressure, pain, difficulty with intercourse or tampons, or recurrent infection. Surgical excision removes the entire cyst wall, which is important because leaving part of the lining behind leads to recurrence. It is usually a short day-case procedure performed under local or general anaesthetic with a straightforward recovery, and healing in this area is generally good.
Aspiration alone—drawing fluid out with a needle—is generally avoided for simple cysts because they refill reliably, offering only temporary relief while risking introducing infection.
Bartholin abscesses are managed differently and deserve specific mention, since they are common and the choice of procedure affects recurrence substantially. Simple incision and drainage relieves pain quickly but is followed by recurrence in a high proportion, because the cavity seals over and refills. Techniques that keep the cavity open while it heals—placing a small balloon catheter for several weeks, or stitching the cyst wall open in a procedure called marsupialisation—have considerably lower recurrence rates and are preferred. Antibiotics are added where there is surrounding infection or the woman is unwell, but drainage is the key intervention rather than antibiotics alone. A new Bartholin mass in a woman over 40 warrants assessment for the rare possibility of gland carcinoma rather than assuming it is a simple cyst.
Urethral diverticulum requires specialist management and should not be approached as a simple cyst. Repair involves excising the diverticulum and reconstructing the urethra in layers, and is performed by surgeons with specific experience because of the risk of fistula formation. Anterior vaginal wall swellings therefore warrant imaging before any procedure, and this is the single most important practical point on this page.
In pregnancy, most vaginal cysts cause no problem and do not obstruct delivery. Large cysts are occasionally assessed in the third trimester for their potential to obstruct the birth canal, though this is uncommon, and cysts that might do so can usually be drained at the time if needed. Removal is generally deferred until after delivery where possible.
Recurrence after complete excision is uncommon, though it is more likely where the cyst wall was incompletely removed or where the underlying cause persists, as with recurrent Bartholin duct obstruction.
A note on self-management is warranted. Attempting to squeeze, puncture, or drain a vaginal or vulval cyst at home is inadvisable and commonly introduces infection into an area that is warm, moist, and richly supplied with blood, converting a minor problem into a painful abscess. Warm baths can help a Bartholin cyst drain spontaneously and are a reasonable measure, but anything beyond that should be done by a clinician.
For Gartner duct cysts, the association with urinary tract abnormalities is worth acting on. Finding a kidney or ureteric anomaly has implications for medication safety, blood pressure, and long-term health that are independent of the cyst itself.
Care is typically managed by primary care and gynaecology, with urogynaecology, urology, or specialist vulval services as needed. Examination, imaging, and where appropriate biopsy findings are interpreted alongside symptoms, obstetric history, and menopausal status rather than in isolation.
Patient education plays an important role, largely because lesions in this area cause anxiety disproportionate to their usual significance. Understanding that most vaginal cysts are harmless, that they do not become cancerous, that observation is a legitimate option, that anterior wall swellings need imaging before any procedure, and that home drainage attempts cause more problems than they solve all contribute to appropriate care.
Red flag symptoms include a lesion that is solid, hard, irregular, fixed, ulcerated, or bleeding; any new vaginal lump in a postmenopausal woman; a lump that is enlarging rapidly; pain with redness, heat, fever, or difficulty sitting or walking, suggesting abscess; continuous dampness, dribbling of urine after voiding, or recurrent urinary infections alongside a front-wall swelling; abnormal vaginal bleeding, particularly after intercourse or after menopause; persistent offensive discharge; and pelvic pain that is progressive rather than stable. These warrant prompt medical evaluation and, for anything not clearly a simple cyst, biopsy.